Vapor-burner.



No. 68!,833. Patented Sept. 3, I90l. W. MITCHELL.

VAPOR BURNER. (Application filed July 24, 1900.)

(No Model.)

NIH II III! UNTTnp STATES PATENT FFIcE;

MITCHELL GAS GENERATOR AND BURNER MASSACHUSETTS.

VAPOR- SPECIFICATION forming part of Letters Application filed July 24:,1900.

To all whom it may concern.-

Be it known that I, WILLIS MITCHELL, a citizen of the United States,residing at Malden, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inVapor-Burners; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to hydrocarbon-vapor burners forsteam-boilers andother places where quick and steady heat is required. It is especiallyintended for automobiles, although not by any means confined thereto.

The said invention consists in certain improvements in the burner andgenerator and in the means for supplying the same, heating them to startthe automatic operation of the burner, and regulating the same.

The aforesaid improvements will be hereinafter more particularly setforth and claimed.

In the accompanying drawings, Figure 1 represents a verticallongitudinal section through the burner and auxiliary devices. Fig. 2represents a detail plan view of the burner, partly broken away. Fig. 3represents a section on line 3 3 of Fig. 1, showing the auxiliaryburner; and Fig. 4 representsa detail perspective View of the jet-block.Fig. 5 represents a detail vertical sectional view of the inlet-tubeclosed by the screw-plug and the proximate part of the tank.

A designates the tank or receptacle for gasolene or other inflammablevolatile liquid. This is supplied through an inlet-tube B ofconsiderable diameter extending down through the top of the same asufficient distanoe to insure an air and vapor space A of considerabledimensions above the surface of the liquid when the tank is fullycharged. The upper end of this tube is flared out to form a bowl or cupB above the said tank. At the junction of this bowl to the cylindricalbody of the tube an external annular flange or shoulder b is formed,which has a horizontal lower face resting on the top of said tank and adownwardly and outwardly beveled periph- COMPANY, on BOSTON,

BURNER.

Patent No. 681,833, dated September 3, 1901.

Serial No. 24,697. (No model.)

eral face adapted to be overlapped by a corresponding face of the inneredge of an annular fastening-plate C, whichis secured to the top of saidtank by rivets c. The inner face of the said bowl at the junction of thesaid tube therewith is provided with an annular recess b, which receivesa packing-ring 1). A doubly-bent air vent or passage e, havingapproximately the shape of the letter 2, extends through the Wall ofsaid inlet-tube at its upper end. A continuation e of the Vertical partof this angular air vent or passage extends down through the wall of thesaid tube to the lower end thereof, and a valve E of rod or pin form isarranged in this extension so as to be movable up or down for closing oropening the said vent. This valve or rod is mounted on the free end of aspring G, which extends across the said tube, being attached at itsother end to the bottom thereof. The said tubeis internallyscrew-threaded at b to receive the external screw-threads h of the stemof the screw-plug H, the top of which is expanded to form a cap restingupon the top of the said bowl B when the said screwplug is in its lowerposition. This screw-plug istubular, the upper end of its bore beingenlarged and screw-threaded at h for the attachment of a couplingthrough which air may be forced into the interior of the said tank. Thelower part of the said bore is also enlarged, forming an elongatedchamber h within which works a valve in the form of an open boxcontaining cork packing 2' and normally forced by a spring I, whichsurrounds the stem I of said valve, against the material of the saidplug at the top of the said chamber h so as to prevent the inflow ofair. A screw J, having a central bore to receive loosely the stemaf0resaid,engages with internal screw-threads at the lower end of thestem of the said screw-plug and serves to adjust the resistance of thesaid spring by being screwed up or down more or less. When air is forcedin, overcoming the resistance of the said valve and spring, it passesdown through the annular space between the valvestem and the wall of thebore of the adjusting-screw. At the upper end of the enlargement orchamber k of the bore a lateral vent e is formed through the wall ofthe; hollow stem of the screw-plug, the same beingar-v ranged toregister with the Vent e aforesaid when the said plug is turned down toits lowest position. At the same time the lower end of the stem of thesaid plug bears against the spring 0 and forces it down, withdrawing thepin or valve E from the vertical part of the vent or passage e, so as toopen the same and allow the exit of air through the apertures ee intothe bore of the screw-plug, from which it may escape when air is notforced into the said bore and the valve therein is not wholly closed. Onthe under side of the head'or cap of the said screw-plug is formed anannular bead H", arranged to be forced into the annular' packinghereinbefore described and spread-the same, so as to make a tight jointbetween the plug and the inlet-tube. In case the screw-plug should notbe turned quite homethe joint may not be quite air-tight orliquid-tight, and it becomes important to prevent the leakage of liquidthrough the same. Insu'ch circumstances the vent 6 will allow theair andvapor of theupper chamberA to escapefromthe said' tank, therebyrelieving the-pressure on'the liquid gasolene to a sufficient extent toprevent the latter from being At one endforced up through the saidjoint.of thesaid tank a gasolene-tube K extends fromthe lower partthereof to afilter-box M, containing suitable filtering material an, whence twosupply-pipesM M extend to the two lower ends ofa-continuous pipewound inconcentric helices to form a tubular generator N; A- tube L forsupplying air and 'gasolene-vapor-is similarly connected with an annularperforated tubular burner O, which surrounds the said generatoranddirects the blaze from its perforations against'thecylindricaloutercasing-N thereof. This burner is used-merely forstarting the self-supplying action of themain burner, hereinafterdescribed, and I therefore denominate it the auxiliary burner. It issupported by: rigid arms-or brackets .O froma rigid frame P, onwhich-the main burner Q. rests. The vertical cylindrical'body of; thisburner Q extends down within the said generator, forming ahollow coretherefor; From said body, at the upper end, extend radial communicatingtubular arms Q, each of which is provided on its-upper side with aseries of perforations q,

through which it discharges flame against aboiler. oranything else whichit may be designed to heat. These tubular arms are of any. convenientnumber, eight of them being I shown-in Fig. 2 of the drawings arrangedafter the fashion ofstar-rays. aforesaid is-fastened at the top byscrews n to these tubes or-rays. At its bottom the said casing has anannular trough or receptacle formedwithand around it for the receptionof alcohol, which maybe usedas an alternativemeans for heatingthe'generator and starting the automatic action of the main burner incase the auxiliary burner should sage W.

The casing N fail to work satisfactorily or it is thought best for anyreason to leave said auxiliary burner out of use. The pipe L is providedwith a cock Z, whereby communication between the air and vapor chamber Aand said auxiliary burner may be cut off when this choice is made.

The upper end of a jet-block R is fitted into the lower end of thetubular body of burner Q. This block is provided with a vertical centralbore 1', terminating in a jet-hole 1", also with a transversecommunicating pas- The said bore receives a needlevalve S, which whollyor partly closes at will the passage through the said jet-hole. The endsof the said transverse passage receive the lower end ofthe inner helixof the gen erator of which the jet-block thus becomes in effect acontinuation, discharging solely through the said jet-hole. Thedownwardlyextendi-ng stem of the said jet-block is ex-' ternallyscrew-threaded to receive an internally-screw-threaded stuffing-box T,which is provided in its lower part with packing material t, fittinginto the concave lower end'of the said jet-block stem. The said stuffingbox has a central perforation i for the passage of the saidneedle-valve, also a tubular downward extension T which is open at itslower end and internally screw-threaded to receive a screw U, the stemof which is hol low, though contracted at the upper end, to allow thepassage of the stem of a needlevalve, while retaining its globular head.A-

rod V fits removably from below into the hollow of this stem'and isremovably held there by a screw- W, engaging threads in the lower end ofthe latter. The disk U, which forms the head of the said screw U, isremovable therefrom and fastened thereon by a clamping-screw 2. Whenthis screw is turnedin 'one direction, it draws out the needle-valve,

opening moreor less the jet-hole'aforesaid.

When turned in the other-direction, it forcesin the said'valve with thereverse thread. As the stem of the needle-valve is cylindrical and asthe openings of the par-ts in contact therewith are cylindrical also,-the valves motion is longitudinal only. When it is to be removedfor anyreason, the screw W and rod V are first taken out, and it then easilyfalls through. Thisavoids all risk offriction in removal and allows thescrew U to remain in place. The aforesaid stuffing-box passes through acrossbar or plate X, which is attached to or forms part of the frameaforesaid and braces said box, the hole in said'bar being only largeenough to conveniently admit the same.

The operation of the generator, burner, and

connecting parts is substantially the same as in my application forpatent on a vapor-burninglamp filed May 17, 1900, Serial No. 17,056.

I do not herein claim the details of construction of the filling plugand tank, the same being covered by my application, Serial No. 33,008,filed October 13, 1900.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In combination with a hydrocarbon- 5 burner having radial perforatedarms and a downwardly extending cylindrical part, a coiled tubulargenerator of cylindrical form surrounding the said cylindrical part, asupplernentaryannular burner surrounding the I said generator forheating the same, a tank or reservoir for liquid hydrocarbon providedwith a space at the top for air and hydrocarbon vapor, a pipe from thesaid tank supply ing said generator with liquid fuel, and a pipe fromthe said air and vapor space supplying the said supplementary burnersubstantially as set forth.

2. In combination with a hydrocarbonburner having a downwardly-extendingcyzo lindrical part, a coiled tubular generator of cylindrical formsurrounding the said cylin drical part, a supplemental annular burnersurrounding the said generator for heating the same, a tank or reservoirfor liquid hydrocarbon provided with a space at the top for air andhydrocarbon vapor, a pipe from the said tank supplying said generatorwith liquid fuel and a pipe from the said air and vapor space supplyingthe said supplemen- ;o tary burner substantially as set forth.

3. A hydrocarbon-burner consisting of a hollow cylindrical body andradial, perforated tubes, in combination with a generator surroundingsaid body and consisting of a tube Wound in concentric helices, pipeswhereby the outer generating-helix is supplied with inflammable fluid atboth ends, a jet-block through which the said fluid passes from theinner helix to the interior of the burner-body and a valve forregulating the flow through the said jet-block, substantially as setforth.

4. In combination with a hydrocarbonburner and means for supplyingthesame, a valve for regulating the said supply, a tubu-' lar screwinclosing the head of said valve and adapted to adjust the said valvelongitudinally without turning it, a removable pin bearing against thesaid head, to hold the said valve normally in place but allowing itsremoval at will and a screw for holding the said pin in placesubstantially as set forth.

5. In combination with a hydrocarbonburner, a generator for supplyingthe same consisting of concentric continuous tubular helices suppliedsimultaneously at both ends of the outer helix, a filter, pipesconnecting these ends to the said filter and a pipe connecting the saidfilter to the source of supply,- substantially as set forth. A

In testimony whereof I aflix my signature in presence of two Witnesses.

WILLIS MITCHELL.

Witnessesf WM. H. BABoooK, GEORGE M. RICHARDS.

